Pulsed laser deposition and dip-coating techniques in the fabrication of bismuth molybdate gas sensors

Le, Minh-Tuan; Kovanda, M.; Myslik, V.; Vrňata, Martin; Driessche, Isabel Van; Hoste, Serge

doi:10.1016/j.tsf.2005.10.081

Cited by 19 publications

(9 citation statements)

References 12 publications

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“…[17][18][19][20][21] For example, trivalent rare earth molybdate phosphors, such as Y 2 (MoO 4 ) 3 :Eu 3+ and Gd 2 (MoO 4 ) 3 :Dy 3+ , have been investigated because they are good hosts for red and green emitting phosphors for solid-state lighting based on InGaN diodes. [22][23][24][25][26][27] Not only Ln-based molybdates but alkali metal molybdates [28][29][30][31] are interesting due to the ionic size of the alkali metals being close to Ln 3+ ions. Among the MMoO 4 (M = Ca 2+ , Ba 2+ & Sr 2+ ) materials, CaMoO 4 is attractive for the following reasons.…”

Section: Introductionmentioning

confidence: 99%

Bilayer stabilized Ln³⁺-doped CaMoO₄ nanocrystals with high luminescence quantum efficiency and photocatalytic properties

et al. 2014

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In this article, we discuss the microwave synthesis of sodium dodecyl sulphate (SDS) stabilized Ln(3+)-doped CaMoO4 nanocrystals (Ln(3+) = Eu(3+), Er(3+)/Yb(3+)). The nanocrystals are quite monodispersed with an average size close to 100 nm. FTIR and TGA analyses suggest strong binding of the SDS molecules to the CaMoO4 nanocrystals surface. The high dispersibility of the nanocrystals in water implies that SDS stabilizes the nanocrystals as a bilayer structure. The SDS coating also assists in the easy dispersion of the nanocrystals in toluene without any additional surface chemistry. The Eu(3+) ions doped in the CaMoO4 nanocrystals display very strong red luminescence with a quantum yield close to 40%. Under 980 nm excitation, Er(3+)/Yb(3+)-doped CaMoO4 nanocrystals display Er(3+) emissions at 550 and 650 nm. In addition, interestingly, a NIR peak at around 833 nm is observed, which occurred via a three photon process. Furthermore, the CaMoO4 nanocrystals exhibit photocatalytic activity which is studied through the degradation of Rhodamine B (RhB) dye in neutral conditions. The RhB dye is significantly degraded by ~80% under UV illumination within 4 h and the rate of degradation is comparable to that observed for well known ZnO nanoparticles. The high luminescence quantum efficiency and strong photocatalytic activity of the Ln(3+)-doped CaMoO4 nanocrystals make them a potential material for dual applications such as bio-imaging and photocatalysis.

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Section: Introductionmentioning

confidence: 99%

Bilayer stabilized Ln³⁺-doped CaMoO₄ nanocrystals with high luminescence quantum efficiency and photocatalytic properties

et al. 2014

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“…Among them, the sol–gel method is considered an effective one to afford pure phases of these catalysts. However, it requires acidic conditions in general, which is harsh and less suitable for practical applications . Previously, we reported the sol–gel synthesis of bismuth molybdates as thin films at near neutral pH conditions, but the mechanism of the sol–gel process at this pH is still unknown although it was clear that the mechanism of the gel formation at high pH is completely different from that at low pH .…”

Section: Introductionmentioning

confidence: 72%

“…However, it requires acidic conditions in general, which is harsh and less suitable for practical applications . Previously, we reported the sol–gel synthesis of bismuth molybdates as thin films at near neutral pH conditions, but the mechanism of the sol–gel process at this pH is still unknown although it was clear that the mechanism of the gel formation at high pH is completely different from that at low pH . During that study, the bismuth cation and the molybdenum cluster anion were predicted to play different roles during the complexation and gelation processes, possibly due to their positive and negative charges, respectively.…”

Section: Introductionmentioning

confidence: 87%

Sol–Gel Synthesis of Bismuth Molybdate Catalysts for the Selective Oxidation of Propylene to Acrolein: Influence of pH Value and Theoretical Molar Atomic Ratio

Hung

Truong

et al. 2017

J Chinese Chemical Soc

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Different bismuth molybdate catalysts for the selective oxidation of propylene to acrolein were prepared by the sol–gel method, starting from bismuth nitrate, ammonium molybdate, and citric acid. The influence of pH value and theoretical molar Bi/Mo atomic ratio on the complexation and gelation is surveyed using IR spectroscopy, X‐ray diffraction, and BET. Their catalytic activities for the conversion propylene to acrolein are examined.

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“…Additionally, the spin‐coating method is unsuitable for mass production, the dip‐coating method cannot be applied for the fabrication of complex irregular surfaces (e.g., high roughness). [ 49 ] Not all the substrates are suitable for the preparation of graphene coatings through chemical vapor deposition (CVD). [ 50 ] Nevertheless, it is feasible to use pure graphene coating to protect microsensors or small surfaces in marine applications.…”

Section: Applications Of Graphene For Combating Marine Biofoulingmentioning

confidence: 99%

Toward the Application of Graphene for Combating Marine Biofouling

Jin

Tian

Bing

et al. 2020

Advanced Sustainable Systems

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The discovery of graphene has brought great innovations to materials science. Since tributyltin antifouling coatings were banned worldwide in 2008, the development of green antifouling coatings has become necessary. Recently, novel graphene‐related antifouling coatings have been the focus of many studies due to their enhanced mechanical strength, excellent antifouling capabilities, and environmental friendliness. This review starts by introducing the basic antifouling mechanisms of graphene nanosheets and the possible antifouling mechanisms when graphene is incorporated into coatings. Subsequently, the progress and existing problems regarding the application of graphene in the prevention of marine biofouling are discussed. Specifically, this review focuses on six graphene‐related antifouling coatings, including pure graphene film, nanohybrids, foul release coatings, photocatalytic nanocomposites, desalination membranes, and materials for uranium enrichment. The fabrication, antifouling properties, working mechanisms, and future development of graphene‐related antifouling coatings are highlighted. In addition, the potential environmental risk of using graphene materials in preventing marine biofouling is explained, and the basic requirements for designing an environmentally friendly graphene‐related antifouling coating are discussed. Finally, the prospect of applying graphene materials for combating marine biofouling is presented. This review aims to aid in improving the design of graphene‐related green antifouling coatings.

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Pulsed laser deposition and dip-coating techniques in the fabrication of bismuth molybdate gas sensors

Cited by 19 publications

References 12 publications

Bilayer stabilized Ln³⁺-doped CaMoO₄ nanocrystals with high luminescence quantum efficiency and photocatalytic properties

Bilayer stabilized Ln³⁺-doped CaMoO₄ nanocrystals with high luminescence quantum efficiency and photocatalytic properties

Sol–Gel Synthesis of Bismuth Molybdate Catalysts for the Selective Oxidation of Propylene to Acrolein: Influence of pH Value and Theoretical Molar Atomic Ratio

Toward the Application of Graphene for Combating Marine Biofouling

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Pulsed laser deposition and dip-coating techniques in the fabrication of bismuth molybdate gas sensors

Cited by 19 publications

References 12 publications

Bilayer stabilized Ln3+-doped CaMoO4 nanocrystals with high luminescence quantum efficiency and photocatalytic properties

Bilayer stabilized Ln3+-doped CaMoO4 nanocrystals with high luminescence quantum efficiency and photocatalytic properties

Sol–Gel Synthesis of Bismuth Molybdate Catalysts for the Selective Oxidation of Propylene to Acrolein: Influence of pH Value and Theoretical Molar Atomic Ratio

Toward the Application of Graphene for Combating Marine Biofouling

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Bilayer stabilized Ln³⁺-doped CaMoO₄ nanocrystals with high luminescence quantum efficiency and photocatalytic properties

Bilayer stabilized Ln³⁺-doped CaMoO₄ nanocrystals with high luminescence quantum efficiency and photocatalytic properties